Ejector system



Sept. 2 1924. 156E868 R. SUCZEK EJECTOR SYSTEM Filed March 31 1922PIFESSURE 0/? SUPER/ EA TED INVENTOR.

YBY Ms-6 Patented Sept. 2, 1924,

MANUFACTURING COMPANY, or TION or PENNSYLVANIA.

nJEcroR sYs'rEM.

Application. filed March .31, 1922. Serial to. $548,369."

To all, whom it may concern:

Be it known that I, ROBERT S ozEK, a

citizen of the United States, residingin the city and county ofPhiladelphia, ,State of Pennsylvania, have invented certain newabstracted from theejector motive fluid, as-

and useful Improvements in. Ejector- Systerms, of which the following isa specifica tion.

My invention relates to a system ;invo-lv-' ing the-employment ofejectors for com pressing or raising the pressure of elastic fluid fromany surtable or desirable pressure to a higher pressure, and morepai'tlcu- 'larly from a pressure below that ofthe a tmosphere to anyother suitable pressure, as

greater or less [than turbine or engine, is deliveredintothecon,

atmospheric pressure, or atmospheric pressure. y

In accordance with my invention, heat 18 steam, when of too high orexcessive pres:

sure or when superheated, or both, andthe. heat so abstracted isusefully applied, andv the motive fluid or steam, after reduction of itspressure, or superheat, or both,fis. still fully effective from theviewpoint ofejector operation.

Further in accordance with my invention, the heatabstracted from theejector .motiye fluid before delivery to the. nozzle structure of theejector apparatus is 'employedfor any'suitable or desired purpose, asfor elevation of temperature of gases vapors or liquids, but is mainlyor preferably; em-

' ployed in generating low pressure steam to be utilized as motive fluidof ejector apparatus, more particularly asthe motive fluid,

of an ejector augmentor preferably associated or co-operating with theaforesaid ejector apparatus.

Further in accordance with my invention the aforesaid ejector system isemployed for producing or maintaining a vacuum in a condenser of a steampower plant in which isbondensed the steam exhausted from a turbine orother steam-driven motor'or en'- gine, and the condensate, preferablyafter it has been utilized as the co'olingmedium of the condenserstructure or structures into which one or more of the ejectorsdischarges, is raised in temperature, preferably for boiler feedpurposes, by heat extracted from the aforesaid high pressure or superheated motive fluid or steam, and prefer- I evaporated into low tormotive fluid;

ROBERT SUCZEK, or PHILADELPHIA, EENNSYLYANIA, ass eno it 0 0. H. ELER PHPH A rmasrnvm:

inventi n 'QS ClQ il the j paratus and system; hereinafter described.

F a nd r and ng of my ;.sys em,

m h d d app at s, 1 deferenc is to be; h to the a c pa yi g dr wgawhich.

is an elevational view, some partsin section,

Of one of v r u lf rmsmy system o apps-i ratus may take;

Referring to the drawing, CY:

denser, which maybe of the jeturjany other suita:ble,type,- but in theexample illustrated is a surface condenser having the-"port -A gh whichsteam orotherj condensable,

fluid, as exhaust steam from a power plant denser C betweent'he;condenser jtubesc, only a few of. which are-indicated, 'tlwough whichpasses cooling water, ,aswell' ,understo odjn the condenser art. From.suit-able region within the condenser U, as from beneath, or.

behind the baffle 1), air andother uneondensed;

- fluid of: the ejector E, the condensate being delivered to anysuitable region, as for ex-- 3 ample, to the hot well H of the condenserC through the pipe a controlled by the 'valve (2. The air and otheruncondensed fluid are withdrawn from the condenser-K by the ejector Ehaving nozzle structure7N discharged into the condenser K of anysuitable type, here indicated as a "surface.

condenser, in which the motive fluid of i the ejector E is condensed,the condensatelbeing delivered to any suitable region,as to the hot wellH throughpipe 6 controlled by the valve f. The uncondensed-fluid iswithdrawn from the condenserK by the ejector,

E of any suitable type, but here indicated as of the typedisclosed inLetters "Patentibf the United States No. 1,282,595? The mix-* ture of'metive' and, entraipe'd fi idsdiis-' condensers K, -K andK asdescribed, it

shall be understood that my invention is not limited thereto, but thatany one or more or all of them may be omitted.

, It will further be understood that either or both of the ejectors E,Emay be of the radial flow type disclosed in said prior Letters Patent ofthe -United States No;

1,282,595 and it. will further be understood that the ejector E may beof a tubular type similar to E or E The cooling medium for thecondensers K, K and K may be anything suitable or desirable, it beingunderstood that one or more of'these condensers may have cooling mediumderived from one source, and one or more of them from any other source.

In the example lllustrated, however, and

preferably, the cooling medium forthese condensers-is thecondensate fromthe condenser' C. The condensate removal pump P is driven by anysuitable motor M, as an electric motor, steam engine or turbine. Thecondensate traverses the cooling systems of the condensers K, K and K inseries or tandem, though the system of piping may be arranged in anyother suitable or desired way. I

Sv 1s a heater or evaporator having a chamber D above the tube sheet i,achamber F.

below the tube sheet j and a chamber G between the tube sheets i and j.Tubes 76, of suitable number, terminate in the tube sheets i and andconnect the chambers D and F. The chambers D and F are also connected bypipe or conduit m, in which is disposed the valve member a controlled bythe float 0 in the chamber G. j The condensate from the condenser C isdelivered into the chamber D through the spray nozzle, rose orequivalent. device I. There is also delivered into the chamber throughthe pipe B condensutefromone or more. of the condensers 1L1? or K asaforesaid, and also, and preferably, malteup water for addition to thecondensate delivered to the chamber D through the device I, to servepreferably as the feed water for the steam generators or boilers of thesteam plant of which the condenser G and auxiliaries are a part. I

The liquids delivered into the chamber D have their temperature raisedtherein by anysuitable heating mediumwhich may be a boiler feed pump forfeeding the heatedwater directly to a steam boiler or boilers, orthrough intermediate economizers; or

other heat transfer structures or other devices, as'may be suitableordesirable in power plant practice.

Through the pipe Q; is delivered live or high pressure steam, as forexample, ofia pressure of seventy pounds or upwardly to two hundred orthree hundred pounds, or more, derived from any source, as the boilerwhich delivers steam to the turbine 01- en? ine which exhausts into thecondenser C. The pipe Q delivers the steam through pipe and valves 9 andr to the nozzle structure.

Q of the ejector E and to the nozzle structure of the ejector E Foreconomic operation of the ejectors E and E or either .of them, from thestandpoint of steam or motive fiuid consumption, excess pressure isunnecessary and wasteful, as may also be any superheat of the steamdelivered by the pipe Q, The heat units represented by excess pressure,orv by superheat, or by both, are not economically availed of in theejector apparatus. The heat units representing excess pressure orsuperheat, or both, are more or less completely abstracted from thesteam delivered by the pipe Q, before reaching the nozzle structures ofeither or both of the ejectors E and E abstraction of heat serving toreduce the pressure of the steam and also to reduce or completely removethe superheat, or both. i

The abstraction of heat is effected by. any suitable heat transferstructure, as the pipe coil R, disposed in the chamber G of the ieateror evaporator S, atmospheric pressure, or preferably less thanatmospheric pressure, obtaining in the chamber Heat is transferred bythe hot water in the tubes is through the walls ofthose tubes to the.

water in the chamber G, and, additional heat is transferred to the water111 the chamber Gr from the pipe coil R, the heat applied tov the waterin the chamber G causing it to boil or vapor ze and produce low pressuresteam, as of a pressurepreferably some-,

what below atmospheric pressure. As the water in. the chamber G isevaporated and delivered to the pipe 8,, thefloat 0 descends and admitswater into chamber G from the chamber D, the float controlled valv inber G by the pipe coil R reduces the pressure or superheat, or both, ofthe steam de livered by the pipe Q, and the heat of the steam generatedin the chamber G is .due.

mainly or principally to the heat in the condensate or Water inthechamber D and to by the pipeQ. 1

he loW pressure steam generated in chamber G is conducted through thepipe 8, controlled by valves 25 and a, between which the pipe 1)controlled by valve to may deliver high pressure steam, When suitablethe heat abstracted from the steam delivered or desirable, upon closureof the valve t.-

pipe 8 delivers steamto the nozzle structure .N of the augmentor ejectorE, while the steam leaving the pipe coil R with reduced pressure orreduced superheat, or-

both, is delivered to the nozzle structures of the ejectors E E suchsteam being nevertheless relatively high pressure or live steam, havinga pressure, for example, of seventy to one hundred and fifty poundspersquare inch, more or less, and suited for economical operation of theejectors E and excess pressure or superheat, or both, and

which would be of little or no benefit in ope eration of the ejectors Eand E having been abstracted and employed, at least in part, forproduction of lowpressure steam for the ejector E.

The ejector E raises the pressure of'the air and other uncondensedelastic fluid, removed from the condenser. C, in which a vacuum of theorder of twenty-eight or twenty-nine inches of mercury is produced ormaintained, to suitably higher pressure, as for. example, from one andone-half times tothree or four times, more or less, the absolutepressure in the condenser C. The steam or motivefiuid from the ejector Eis condensed in the condenser K, and the air and other uncondensed fluidare then further raised in pressure by ejectors E and E the air anduncondensed elastic fluid being finally discharged from the condenser Kat w, to atmosphereor to any other desired regionat any suitablepressure, as atmospheric pressure, or a pressure above or belowatmospheric.

The ratio of compression of the ejector E may be anything suitable ordesirable, and maybe, as aforesaid, from aboutone and one-half to threeor four; and the relation of the ratios ofcompression of the ejectors Eand E may be made anything suitable or desirable, and may be thatdescribed in Letters Patent of the United States No. 1,283,593. j

By the method and apparatus described. the motivefluid for the ejector Eis econom .utilizing the abstracted heat.

ically procuredby utilizing heat of the feed Water orfcondensate inchamber D and the heatin thesteam for the ejectors E and E or eitherv ofthem, which would other- Wise not be efficiently employed in operatingthem; and there is a further economy in that the amount of motive fluidrequired for the ejectors E and E or either of them, is materiallyreduced, from the fact that the augmento'r E performs a substantialportion of the entire Work of compressing the air and otheruncondensable elastic fluid from the condenser C other pressure p 1 vWhile the ejector or augmentor E, employing the low pressure steam, isprefer: ably employedto effect the first stage of to atmospheric orcompression, it will be understood that it may be used in any otherposition in a laterstage of a series of one or more ejectors.- v I ItWillbe further understood that'the ejector E may be omitted orsupplanted by any other type of air pump, asa mechane icalair pump;orboth ejectorsE andE may be supplanted by another type of .air. pump orpumps, asa mechanical air pump or pumps. j I,

F or the sake of brevity in the appended claims, the term steam includessteam and anyequivalent elastic fluid, and the term airtincludes'air andother uncondensed or uncondensable elastic fluid.

hat I'claim is: 7 i j 1. Themethod which comprises abstracting heat fromlive steamhaving excess pressure or superheat, or both, thereafter eX-panding the live steam of reduced pressure or superheat, or both, into ajet, entraining airby the .jet, -c onverting the-velocity of themixtureofair andsteam into pressure, and- 2. The method which comprisestransferring heat from steam having excess pressure 'orsuperheat, orboth, to a-liquid to produce {low pressure steam, expanding the .lowpressure steam into a jet, entraining ,air by said jet, andconvertingthe velocity of the air and steam into pressure.

3. The method which comprises abstracting heat from steam having excesspressure or superheat, or both, and thereafter expanding thesteam into ajet, entraining air ing heat from steam having excess pressure orsuperheat, or both, and thereafter expanding the steam into a jet,entraining air by the jet, converting the velocity of the mixture of airand steam into pressure, and absorbing the abstracted heat in the production of low pressure steam, expanding the low pressure steam into asecond jet, entraining air by said second jet, and converting thevelocity of the mixture into pressure. I

6. The method which comprises transferrin heat from steam hav1n excesspressure or superheat, or both, to a liquid to produce low pressuresteam, expanding the low pressure steaminto a jet, entraining air bysaid jet, converting the velocity of the air and steam into pressure,and ejecting the air so raised in pressure to higher pressure byexpansion ot said steam from which heat has been abstracted.

7. The method which comprises transferring heat from steam havingsuperheat or excess pressure, or both, to low pressure steam,.expandingthe low pressure steam into a jet, entraining air by the jet, andconverting the velocity or the mixture into pressure.

8. The method which comprises producing low pressure steam whose heat isderived in part from heated liquid and in part by heat abstracted fromsteam having superheat or excess pressure, or both, and ejecting air bythe low pressure steam to higher pressure.

9. The method which comprises producing low pressure steam whose heat isderived in part from heated liquid delivered to a region of lowerpressure at which it vapor-v izes and in part by heat abstracted fromsteam having superheat or excess pressure, or both, and ejecting air bythe low pressure steam to higher pressure.

10. The method which comprises producing low pressure steam whose heatis derived in part from heated liquid and in part by heat abstractedfrom steam having superheat or excess pressure, or both, ejecting air bythe low'pressure steam to higher pressure, and utilizing the steam fromwhich heat has been abstracted for ejecting air to higher pressure.

11. The method which comprises producing low pressure steam whose heatis derived in part from heated liquid and in part by heat abstractedfrom steam having superheat or excess pressure, or both, ejecting air bythe low pressure steam to higher pressure, and utilizing the steam fromwhich heat has been abstracted for ejecting said air to still higherpressure.

12. The method which comprises producing low pressure steam whose heatis derived in part from heated liquid delivered to a region of lowerpressure at which it vaporizes and in part by heat abstracted from steamhaving superheat or excess pressure, or both, ejecting air by the lowpressure steam to higher pressure, and utilizing the steam from whichheat has been abstracted for ejecting air to higher pressure.

13. The method "which comprises pro ducing low pressure steam whose heatis derived in part from. heated liquid delivered to a region of lowerpressure at which it vaporize's and in part by heat abstracted fromsteam having superheat or excess pressure, or both, ejecting air by thelow pressure steam to higher pressure, and utilizing the steam fromwhich heat has been abstracted for ejecting said air to still higherpressure. i 9

1 1. The method which comprises condensing steam, vaporizing thecondensate into low pressure steam whose heat is at least in part theheat abstracted from steam having superheat or excess pressure,'or both,and ejecting to'higher pressure air by said low pressure steam from thespace in which said first named steam is condensed.

15. The method which comprises condensing steam, vaporizing thecondensate.

into low pressure steam whose heat is at least in part the heatabstracted from steam havin su Jerheat or excess ressure or both I n b Ip 9 n 7 e ecting to higher pressure air by said low pressure steam fromthe space n which'saidfirst named steam is condensed, and ejecting saidair to still higher pressure by said steam from which heat has beenabstracted.

16. The method which comprises condensing steam, transferring heat to"the condensate to raise its temperature, transferrmg the heatedcondensate to a region of lower pressure for production of low.

pressure steam at least a part of whose heat is abstracted from steamhaving superheat or excess pressure, or both, and ejecting air by saidlow pressure'steam'trom the space in which said first named steam iscondensed to higher pressure.

17. The method which comprises condensing steam, transferring heat tothe condensate to raise its temperature, transferring th'eheatedcondensate to a region of lower pressure for production of low' pressuresteam at least a part of whose heat is abstracted from steam havingsuperheat or excess pressure, or both, and ejecting air derived from thespace in which said first named steam is condensed to higher pressure bysaid steam from which heat has been abstracted.

18. The method which comprises condensing steam, transferring heat tothe condensate to raise its temperature, transferring the heatedcondensate to a region of lower pressure for production of low pressuresteam at least a part of whose heat is abstracted from steam havingsuperheat or excess pressure, or both, ejecting air by said low pressuresteam from the space in which said first named steam is Condensed tohigher said source and the nozzle structure of said ejector forabstracting and utilizing heat from the steam to effect live motivesteam for said ejector. j

20. The combination With an ejector, of a source of superheated steam, aconnection from said source, to the, nozzlestructure of said ejector,and means in said connection for abstracting heat from the steam toreduce its superheat.

21. The combination With an ejector, of a sourceof live steam, aconnection between said .sourceand' the nozzle structure of saidejector, and means for reducing the pressure of said steambeforereaching said nozzle structure comprising means in said connectionforabstr'acting and utilizing heat from the steam to effect live motivesteam for said ejector.

22. The combination with an ejector, of a source of'live steam havingsuperheat and" eXcess pressure, a connection from said source to thenozzlestructure' of said ejector,

and means in said connectionfor abstracting heat from the steam at arateto reduce its superheat and pressure to effect 'live m0- tive steamfor said ejector.

23. The combination with an ejector, of

a source of loW pressure steam connected with the nozzle structurethereof and com' prising means for heating a liquid, source of steam,and heat transfer structure traversed by steam from said source forimparting additional heat to said liquid.

24'. The combination'with an ejector, of a source of 10W pressure steamconnected with the nozzle structure thereof and comprising means forheating a liquid, a source of steam, heat transfer structure traversedby steam from said source for imparting additional heat to said liquid,a second ejector, and means for conducting steam from said heat transferstructureto the nozzle struc ture of'said second ejector.

.25. The combination with an ejector, of a source' of low pressure steamconnected With the nozzle structure'thereof and comprising means forheating a a liquid, a source of steam, heat transferstructure traversedby steam from said source for imparting. additionalheat to said liquid,a second ejector,

means for conducting steam from said heat transfer structure to thenozzle structure of said second e ector. and means for connecting saidejectors in series.

, 26; The combination with an ejector, 'of' asource of low pressuresteamconnected With heat to said liqu d the'nozzle structure ther tt (56ising means for heat nga liqu d, a source of steam,

the nozzle structure thereof, means for im 1 parting heat to said lovvpressure st am comprlsing heat transfer structure, a second ejector, andmeans for deliveringjsteain the nozzle structure of said second e jector through. sa d;heat transfeii'structu 29. Thej coinbination ith anect-time source of low pressure'stea n connectedvtiith thev nozzlestructure thereof, .means for 1mpart n'gf heat to said low pressuresteam comprising heat transfer structure, a second ejector, means fordelivering steam tolthe' nozzle structure. of second eje'ctor throughsaid heat transfer structure, and means connecting said ejectorsfin''series 3.0. The combination with. an ejector", of a" source" of lowpressure stea connected with the nozzle structure thereof, means forimparting heat to said low/pressure steamcomprising heattransfertstructure', a second" ejector, means for delivering steam tothfe nozzle structure of ;said second 'ej'ecto'r through said" heatstructure, and means for connecting the di scharge of said first named eector to the'su'ction of said second named ejector. I, 31. Thecomb'ination with a plurality of ejectors, of sources of and lovvpressure steam connected, resnectively, to the nozzle structures of saidejectors and means 'for extracting heat from the high pressure steam anddelivering it to the low pressure steam. I m v 32. The combinationjvithafplurality of ejectors,. of sources of high and low pressure steamconnected, respectively, to the nozzle structures of said ejectors,means for extracting heat from the high pressure. steam and deliveringit ,to the lowpressure steam and meansv for connecting said] ejectorsin'series. v I 33, The combination Withja, plural'ityof ejectors, ofsourcesof high and low pressure steam connected, respectively, to the'nozzle! structures of'said ejectors, meansl forerr tracting heat fromthe high pressure and delivering it to the low'pressure' steam,

iii]

and means for connecting the discharge of an ejector operated by lowpressure steam to the suction of an ejector operated by high pressuresteam.

34. The combination with a plurality of ejectors, of sources of high andlow pressure steam connected, respectively, to the nozzle structures ofsaid ejectors, means for ex.- tract-ing heat from the high pressuresteam and delivering it. to the low'pressure steam, means for connectingsaid ejectors in series, a condenser between said ejectors, and meansfor delivering condensate from said condenser to said source oflowpressure steam.

85. The combination with a plurality of ejectors, of sources of high andlow pressure steam connected, respectively, to the nozzle structures ofsaid ejectors, means for extracting .heat from the high pressure steamanddelivering it to the low pressure steam, means for connecting the.discharge of an ejector operated by low pressure steam to the suctionof-an ejector operated by high pressure steam, a condenser between saidejectors, and means for delivering condensate from said condenser tosaid source of low pressure steam.

36. The combination with an evaporating chamber, of a source of steam,an ejector, a connection from said source to the nozzle structure ofsaid ejector, and structure in said connection disposed in said chamberfor transferring heat from steam from said source into said chamber.

37. The combination with an evaporating chamber, of a source of steam,an ejector. a connection from said source to the nozzle structure ofsaid ejector, structure in said connection disposed in. said chamber fortransferring heat from steam. from. said source'into said chamber, and asecond heatt-ransfer structure in said chamber.

38. The combination with an evaporating chamber, of a source of steam,an ejector. a connection from said source to the nozzle structure ofsaid ejector, structure in said connection disposed in said chamber fortransferring heat from steam from said source into said chamber. asecond heat transfer structure in said chamber, and a liquid heatingchamber communicating with said second heat transfer structure.

39. The combination with an evaporating chambenof a source of steam. anejector, a

connection fromsaid source to .the nozzle structure of said ejector,structure in said connection disposed in said chamber for transferring.heat from steam from said source into said chamber, a second heattransfer. structure in said chamber, a liquid chamber...

40. The combination with an evaporating chamber, of a source of steam,an ejector, a connection from said source to the nozzle structure ofsaid ejector, structure in said connection disposed in said chamber fortransferring heat from steam from said source into said chamber, asecond heat transfer structure in said. chamber, a liquid heatingchamber communicating with said second heat transfer structure, meansfor. conducting a portion of the liquid from said heating chamber intosaid. chamber. the pressure in said evaporating chamber being lower thanin said liquid heating chamber.

41. The combination with an evaporating chamber, of a source of steam,an ejector,a connection from said source to the nozzle structure ofsaidejector, structure in said connection disposed in. said chamber fortransferring heat from steam from said source into said chamber, and asecond ejector whose nozzle structure is connected to said evaporatingchamber. I

42. The combination with an evaporating chamber, of a source of steam,an ejector. a connection. fromsaid source to the nozzle structure ofsaid ejector, structure in said connection disposed in said chamber fortransferring heat from steam from -said-.,

source into said chamber, a second heat transfer structure in saidchamber, and a heating chamber communicating with said second heattransfer structure, and a second e ector whose nozzle structure isconnected to said evaporatlng chamber.

44. The combination with an evaporating chamber, of a source of steam.an e ector, a connection from said source to the nozzlestructure of saidejector, structure in said connection disposed in said chamber for,

transferring. heat from steam from said. source into said chamber, asecond heat transfer structure in said chamber, a liquid heating chambercommunicating with said second heat transfer structure, means forconducting a portion of the liquid from said heating chamber into saidevaporating chamber, and a second ejector whose nozzle structure isconnected to said evaporating chamber. 7

45. The combination with an evaporating chamber, of a source of steam,an ejector, a connection from said source to the nozzle structure ofsaid ejector, structure in said.-

evaporating too , low pressure steam. v v 50. Thecombinatlon with'acondenser, of-

connection disposed in said chamber for transferring heat from:steam"from said source into said chamber, a second heat transferstructure in said chamber, a liquid heating chamber communicating withsaid second heat transfer structure, means for conducting a portion ofthe liquid from said heating chamber into said evaporating chamber, thepressure in said evaporating chamber being lower than in said liquidheating cha'mber, and a second ejector whose nozzle structure isconnected to said evaporating chamber, I

4:6. The combination with an evaporating chamber. of a source of steam,an ejector, a connection with said source to the nozzle structureof'said ejector", structure insaid connection disposed in said chamberfor transferring heat from" steam from said source into said chamber, asecond ejector whose discharge communicates with the suction of saidfirst named ejectonand means connecting said evaporating chamber, withthe nozzle structure of said second ejector."

47. The combination" with an evaporating chamber, of a source of steam,an ejector, a connection from said source; to the nozzle structure ofsaid ejector, structure in said connection, disposed in said chamber fortranferring heat from steam from said source into said chamber. asecond: heat transfer structure in said chamber, a'second' ector whosedischarge communicates ,with

the suction of said first named ejector, and

means connecting said evaporating chamber with the nozz'le'structure ofsaid second ejector. j I j 48. The combination'with an. eva oratingchamber, of asource of steam, an ejecto'iga connection from said sourceto the nozzle structure of said ejector, structure in said connectiondisposed 'in s'aid chamber for transferring heat from steam from saidsourcev into said chamber, a second heat,

transfer structure in said chamber, a liquid heatlng chamber commun catng wlth sa1d second heat, transfer structure; a second ejector whosedischarge communicates with, the suction of said firstnamed ejectenandmeans connecting said evaporating chamber the nozzle structure of saidsecond ejector. j

49. The combination with a condenser, of a source of low pressure steam,means" for de-,

' liver'ing condensate from said condenser to said source, an ejectorfor removing air from said condenser, a connect on from the nozzlestructure of saidejector to said source, a sec: ond source of steam,asecond ejector, aiconne'cticn from said second source of steam to" thenozzle'structure of said second ejector,

and heat transfer structure in said connection for dehvering heat tosa1d source of.

a source of low pressi'ire steam, means for de? livering condensate fromsaid condenser tosaid source, an ejector for removing air nozzlestructure of said ejector to said source, a second source of steam, asecond ejector, a connection from said secoi'idisource of steam to'thenozzle structure of said sec ond ejector, heat transfer structure insaid connection for delivering heat tosaid' source of low pressuresteam; a condenser through which one of said ej ectors'is connected to;the other, and means forconducting said con densate of said firstcondense-r through the cooling system of said second condenser inadvance of delivery to saidsource of low pressure steam. i

from saidcondenser, a connection'from the 5 1. The combination with acondenserfof a source of lovvpressure steam, means for deliveringcondensate from sa1d condenser to said source,'an e ector for remcvmgair from said condenser, a connection from the nozzle structure of saidejector to said source, a

second source of steam, a second ejector,"a connection from said secondsource of steam io'theinoz'zle structure of said second ejector,-

heat transfer structure in said connection for delivering'heat to saidsource 'of low pressure steam, means-for connecting said e ectors inseries, a condenser into which'the later stage ejector discharges,'andmeans for conducting said condensate of said first named condenserthrough the cooling system of said second condenser in advance'ofdelivery to said source'of low. pressure steam =52. The combination witha con'denseryof a source of'low pressure steamfmeans'for de li'vering'condensate from said condenser to said source, an ejector for removingair from said condenser, a connection from the nozzle.

delivering condensate from said condenserto said source, an ejector forremoving air from said condenser, a connection fromthe nozzle structureof said ejector to said source, a second source' of steam, a second eector, a connection from sa1d second source ofstea'm to the nozzlestructure of said ec: ond e ector, heat transfer structure in said;

connection for delivering heatto said source of low pressure steam, athlrdejector whose nozzle structure receives steam throughjsaid heattransfer structure, a condenser into which said third ejectordischarges, and means for conducting sa1d condensate from said firstcondenser through the cooling system of said second condenser in advanceor delivery to said source of low pressure steam.

54. The combination with a condenser, of ejectors employing,respectively, high and low pressure steam as motive fluid for removingair from said condenser, a heater, means for delivering condensate fromsaid condenserto said heater, an evaporator producing low pressure steamheated by the hot condensate, a connection from said evaporator to thenozzle structure of one of said ejectors, a source of high pressuresteam, a connection therefrom to the nozzle structure of another of saidejectors, and heat transfer structure in said connection disposed insaid evaporator.

55. The combination with a condenser, of ejectors employing,respectively, high and low pressure steam as motive fluid for removingair from said condenser, a heater, means for delivering condensate fromsaid condenser to said heater, an evaporator producing low pressuresteam heated by the hot condensate, means for delivering a part of theheated condensate to said evaporator, a connection from said evaporatorto the nozzle structure of one of said ejectors, asource of highpressure steam, a connection therefrom to the nozzle structure ofanother of said ejectors, and heat transfer structure in said connectiondisposed in said evaporator.

56. The comb nation with a condenser, of ejectors employing,respectively, high and low pressure steam as motive fluid for removingair from said condenser, a heater, means for delivering condensate fromsaid condenser to said heater, an evaporator producing low pressuresteam heated by the hot condensate, a connection from said evaporator tothe nozzle structure of one of said ejectors, a source of high pressuresteam, a connection therefrom to the nozzle structure of another of saidejectors, heat transfer structure in said connection disposed in saidevaporator, condensing means associated with said ejectors, and meansfor passing said condensate of said condenser through the cooling-systemof said condensing means in advance of delivery to said heater.

57. The combination with a condenser, of ejectors employing,respectively, high and low pressure steam as motive fluid for removingair from said condenser, a heater. means for delivering condensate fromsaid condenser to said heater, an evaporator producing low pressuresteam heated by the hot condensate, means for delivering a part of theheated condensate to said evaporator, a connection from said evaporatorto the nozzle structure of one of said ejectors, a source of highressure steam, a connection therefrom to the nozzle structure of anotherof said ejectors, heat transfer structure in said connection disposed insaid evaporator, condensing means associated with said ejectors, andmeans for passing said condensate of said condenser through the coolingsystem of said condensing means in advance of delivery to said heater.

58. The combination with ejectors oper ated, respectively, by high andlow pressure steam as motive fluid, of a heater having a plurality ofchambers, an. evaporating chamber between said, chambers. tubes passingthrough said evaporating chamber and connecting said chambers of saidheater, a connection from said evaporating chamber to the nozzlestructure of one of said ejectors, a source of high pressure steam, aconnect on therefrom to the nozzle structure of another of saidejectors, and heat transfer structure in said connection and disposed insaid evaporating chamber. 59. The combination with eiectors operated,respectively, by high and low pressure steam as motive fluid, of aheater having a plurality of chambers, an evaporating chamber betweensaid chambers. tubes passing through said evaporating chamber andconnecting said chambers of said heater, a connection from saidevaporating chamber to the nozzle structure of one of said ejectors, asource of high pressure steam, a connection therefrom to the nozzlestructure of another of said eiectors, heat transfer structure in saidconnection and disposed in said evaporating chamber, and meansdelivering l quid from one of said heater chambers to said evaporatingchamber in accord with the amount of low pressure steam delivered tosaid one of said eiectors. I 60. The method which consists in deliveringwater to a region having a pressure below atmospheric pressure toconvert it into low pressure steam, expanding said low,

pressure steam into a jet, and entraining fluid by said jet and raisingit to higher pressure.

61. The method which consists in delivering water to a region having apressure be-v low atmospheric pressure, adding heat thereto while insaid region to produce low press sure steam, expandingv said lowpressure steam into a iet, and entraining fluid by said jet and raisingit to'higher pressure.

62. The method which consists in delivering a portion of a. body ofwater into a region having a pressure below atmospheric pressure.transferring heat from said body of water to said water in saidregion tocon vert the, same into low pressure steam, ex: pandingr said lowpressure steam into a jet, and cut-raining fluid by said jet and raisingit to higher pressure. v

63. The method which consists in delivering water to a region having apressure be- 1 low atmospheric pressure to convert it into low pressuresteam, expanding said low pressure steam into a jet, entraining fluid bysaid jet and raising it tohigher pressure, and thereafter extractingheat" from said steam to increase the heat content of said water beforeits delivery to said region.

64. The method which consists in delivering water to a region having apressure below atmospheric pressure, adding heat thereto while in saidregion to produce low pressure steam, expandlng said low pressure steaminto a jet, entraining fluid by said jet and raising it to higherpressure, and thereafter extracting heat from said steam to increase theheat content of said water before its delivery to said region.

65. The method which consists in delivering a portion of a body of waterinto a region having a pressure below atmospheric pressure, transferringheat from said body of water to said water in said region to convert thesame into low pressure steam, expanding said low pressure steam into ajet, entraining fluid by said jet and raising it to higher pressure, andthereafter extracting heat from said steam to increase the heat contentof said water.

66. The combination with a chamber within which there exists-a pressurebelow at mospheric pressure, of means for delivering water thereto forthe production of low pressure steam, an ejector, and'a connection fromsaid chamber to the nozzle structure of said ejector.

67. The combination with a chamber within which there exists a pressurebelow at-f mo spheric pressure, of means for delivering water thereto,means for adding heat to the water in said chamber in the production oflow pressure steam, an ejector, and a connection from said chamber tothenozzle structure of said ejector.

chamber in the pro uction of low pressure steam, an ejector, and aconnection from said chamber to the nozzle structure of said e ector.

69. The combination with a chamber within which there exists a pressurebelow atmospheric pressure, of means for delivering water theretofor theproduction of low pressure steam, an' ejector, a connection from saidchamber to the nozzle structure of said ejector, and means fortransferring heat from the fluid discharged by said ejector to saidWater.

70. The combination with achamber with in which there exists a pressurebelow atmospheric pressure, of means for delivering water thereto, meansfor adding heat to the water in said chamber in the production of lowpressure steam, an ejector, a connection from said chamber to the nozzlestructure of said ejector, and means for transferring heat from thefluid discharged by said ejector to saidwater.

'chamberin the production of low pressure steam, an ejector, aconnection from said chamber to the nozzle structure of said e ector,and means for transferr ng. heat from the fluid discharged'by. saidejector to said water. V

72. The combination with a condenser, of an ejector forwithdrawing airtherefrom, a chamber within which there exists a pressure belowatmospheric pressure, means for delivering condensate from saidcondenserto said chamber in the production of low pressure steam, aconnection from said chamber to the nozzle structure of said. ejector,and means 'for delivering heat from the dis.- charge of said ejectorinto said condensate. In testimony whereof I have hereunto affixed mysignature this 29" day of March, 1922. Y

ROBERT SUCZEK.

